According to:

https://ttkthemes.readthedocs.io/en/latest/authors.html#gnu-gplv3-themes

Thit theme is © Copyright (c) 2020 RedFantom, 2015 Sergei Golovan,
[[https://github.com/ubuntu/yaru/blob/master/AUTHORS][the yaru_authors]].

Released under GNU GPLv3

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see [[http://www.gnu.org/licenses/]].
